CO oxidation of bare and TiO2-coated NiO-Ni(OH)2 nanoparticles

Jong Won Nam; Kwang Dae Kim; Dong Wun Kim; Hyun Ook Seo; Young Dok Kim; Dong Chan Lim

doi:10.1016/j.cap.2011.07.044

CO oxidation of bare and TiO₂-coated NiO-Ni(OH)₂ nanoparticles

Jong Won Nam
, Kwang Dae Kim
, Dong Wun Kim
, Hyun Ook Seo
, Young Dok Kim
, Dong Chan Lim

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

CO oxidation reactivity of bare and TiO₂-coated nanoparticles consisting of both NiO and Ni(OH)₂ surfaces was studied. For the deposition of TiO₂, atomic layer deposition was used, and formation of three-dimensional domains of TiO₂ on NiO-Ni(OH)₂ could be identified. Based on the data of X-ray Photoelectron Spectroscopy, we suggest that upon TiO₂ deposition only Ni(OH)₂ was remained on the surface, whereas NiO surface disappeared. Both CO adsorption and CO oxidation took place on NiO-Ni(OH)₂ surfaces under our experimental conditions. CO adsorption was almost completely suppressed after TiO₂ deposition, whereas CO oxidation activity was maintained to large extent. It is proposed that bare NiO cannot be active for CO oxidation, and can only uptake CO under our experimental condition, whereas hydroxylated surface of NiO can be active for CO oxidation.

Original language	English
Pages (from-to)	429-433
Number of pages	5
Journal	Current Applied Physics
Volume	12
Issue number	2
DOIs	https://doi.org/10.1016/j.cap.2011.07.044
State	Published - Mar 2012

Keywords

Atomic layer deposition (ALD)
CO oxidation
Ni
Oxide
TiO

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10.1016/j.cap.2011.07.044

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title = "CO oxidation of bare and TiO2-coated NiO-Ni(OH)2 nanoparticles",

abstract = "CO oxidation reactivity of bare and TiO2-coated nanoparticles consisting of both NiO and Ni(OH)2 surfaces was studied. For the deposition of TiO2, atomic layer deposition was used, and formation of three-dimensional domains of TiO2 on NiO-Ni(OH)2 could be identified. Based on the data of X-ray Photoelectron Spectroscopy, we suggest that upon TiO2 deposition only Ni(OH)2 was remained on the surface, whereas NiO surface disappeared. Both CO adsorption and CO oxidation took place on NiO-Ni(OH)2 surfaces under our experimental conditions. CO adsorption was almost completely suppressed after TiO2 deposition, whereas CO oxidation activity was maintained to large extent. It is proposed that bare NiO cannot be active for CO oxidation, and can only uptake CO under our experimental condition, whereas hydroxylated surface of NiO can be active for CO oxidation.",

keywords = "Atomic layer deposition (ALD), CO oxidation, Ni, Oxide, TiO",

author = "Nam, \{Jong Won\} and Kim, \{Kwang Dae\} and Kim, \{Dong Wun\} and Seo, \{Hyun Ook\} and Kim, \{Young Dok\} and Lim, \{Dong Chan\}",

year = "2012",

month = mar,

doi = "10.1016/j.cap.2011.07.044",

language = "English",

volume = "12",

pages = "429--433",

journal = "Current Applied Physics",

issn = "1567-1739",

publisher = "Elsevier B.V.",

number = "2",

}

TY - JOUR

T1 - CO oxidation of bare and TiO2-coated NiO-Ni(OH)2 nanoparticles

AU - Nam, Jong Won

AU - Kim, Kwang Dae

AU - Kim, Dong Wun

AU - Seo, Hyun Ook

AU - Kim, Young Dok

AU - Lim, Dong Chan

PY - 2012/3

Y1 - 2012/3

N2 - CO oxidation reactivity of bare and TiO2-coated nanoparticles consisting of both NiO and Ni(OH)2 surfaces was studied. For the deposition of TiO2, atomic layer deposition was used, and formation of three-dimensional domains of TiO2 on NiO-Ni(OH)2 could be identified. Based on the data of X-ray Photoelectron Spectroscopy, we suggest that upon TiO2 deposition only Ni(OH)2 was remained on the surface, whereas NiO surface disappeared. Both CO adsorption and CO oxidation took place on NiO-Ni(OH)2 surfaces under our experimental conditions. CO adsorption was almost completely suppressed after TiO2 deposition, whereas CO oxidation activity was maintained to large extent. It is proposed that bare NiO cannot be active for CO oxidation, and can only uptake CO under our experimental condition, whereas hydroxylated surface of NiO can be active for CO oxidation.

AB - CO oxidation reactivity of bare and TiO2-coated nanoparticles consisting of both NiO and Ni(OH)2 surfaces was studied. For the deposition of TiO2, atomic layer deposition was used, and formation of three-dimensional domains of TiO2 on NiO-Ni(OH)2 could be identified. Based on the data of X-ray Photoelectron Spectroscopy, we suggest that upon TiO2 deposition only Ni(OH)2 was remained on the surface, whereas NiO surface disappeared. Both CO adsorption and CO oxidation took place on NiO-Ni(OH)2 surfaces under our experimental conditions. CO adsorption was almost completely suppressed after TiO2 deposition, whereas CO oxidation activity was maintained to large extent. It is proposed that bare NiO cannot be active for CO oxidation, and can only uptake CO under our experimental condition, whereas hydroxylated surface of NiO can be active for CO oxidation.

KW - Atomic layer deposition (ALD)

KW - CO oxidation

KW - Ni

KW - Oxide

KW - TiO

UR - https://www.scopus.com/pages/publications/81155150068

U2 - 10.1016/j.cap.2011.07.044

DO - 10.1016/j.cap.2011.07.044

M3 - Article

AN - SCOPUS:81155150068

SN - 1567-1739

VL - 12

SP - 429

EP - 433

JO - Current Applied Physics

JF - Current Applied Physics

IS - 2

ER -

CO oxidation of bare and TiO₂-coated NiO-Ni(OH)₂ nanoparticles

Abstract

Keywords

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